When implementing a new constraint, what moves into production?

Hello,

I have created a table in production with a primary key constraint.

I want to add a foreign key constraint.

I use a source member that gets moved and then RUNSQLSTM with a special command that adds the constraint to the file.

normally with a table change we promote the table but if it is just a constraint change, we dont just move the constraint? How do we move a constraint into production if there is no object to move?

What are the steps?

When we promote a table change we create/recreate the table in our staging area and move it into the production area. What do you move when it is just a new constraint?